include/sound/designware_i2s.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * Copyright (ST) 2012 Rajeev Kumar (rajeevkumar.linux@gmail.com)
0004  */
0005
0006 #ifndef __SOUND_DESIGNWARE_I2S_H
0007 #define __SOUND_DESIGNWARE_I2S_H
0008
0009 #include <linux/dmaengine.h>
0010 #include <linux/types.h>
0011
0012 /*
0013  * struct i2s_clk_config_data - represent i2s clk configuration data
0014  * @chan_nr: number of channel
0015  * @data_width: number of bits per sample (8/16/24/32 bit)
0016  * @sample_rate: sampling frequency (8Khz, 16Khz, 32Khz, 44Khz, 48Khz)
0017  */
0018 struct i2s_clk_config_data {
0019     int chan_nr;
0020     u32 data_width;
0021     u32 sample_rate;
0022 };
0023
0024 struct i2s_platform_data {
0025     #define DWC_I2S_PLAY    (1 << 0)
0026     #define DWC_I2S_RECORD  (1 << 1)
0027     #define DW_I2S_SLAVE    (1 << 2)
0028     #define DW_I2S_MASTER   (1 << 3)
0029     unsigned int cap;
0030     int channel;
0031     u32 snd_fmts;
0032     u32 snd_rates;
0033
0034     #define DW_I2S_QUIRK_COMP_REG_OFFSET    (1 << 0)
0035     #define DW_I2S_QUIRK_COMP_PARAM1    (1 << 1)
0036     #define DW_I2S_QUIRK_16BIT_IDX_OVERRIDE (1 << 2)
0037     unsigned int quirks;
0038     unsigned int i2s_reg_comp1;
0039     unsigned int i2s_reg_comp2;
0040
0041     void *play_dma_data;
0042     void *capture_dma_data;
0043     bool (*filter)(struct dma_chan *chan, void *slave);
0044     int (*i2s_clk_cfg)(struct i2s_clk_config_data *config);
0045 };
0046
0047 struct i2s_dma_data {
0048     void *data;
0049     dma_addr_t addr;
0050     u32 max_burst;
0051     enum dma_slave_buswidth addr_width;
0052     bool (*filter)(struct dma_chan *chan, void *slave);
0053 };
0054
0055 /* I2S DMA registers */
0056 #define I2S_RXDMA       0x01C0
0057 #define I2S_TXDMA       0x01C8
0058
0059 #define TWO_CHANNEL_SUPPORT 2   /* up to 2.0 */
0060 #define FOUR_CHANNEL_SUPPORT    4   /* up to 3.1 */
0061 #define SIX_CHANNEL_SUPPORT 6   /* up to 5.1 */
0062 #define EIGHT_CHANNEL_SUPPORT   8   /* up to 7.1 */
0063
0064 #endif /*  __SOUND_DESIGNWARE_I2S_H */